Step 1: Understanding the Concept:
National dairy production data published by the Department of Animal Husbandry and Dairying (DAHD), Government of India.
Step 2: Detailed Explanation:
India's total milk production during the financial year 2018-19 was officially recorded at $187.7\,\text{million tonnes}$ ($pprox 188\,\text{million tonnes}$), retaining India's position as the largest milk producer in the world since 1998.
Step 3: Final Answer:
Therefore, the milk production in India in 2018-19 was 188 million tonnes.